# include <iostream>
using namespace std;

class Box{
    public:
    double getVolume(void){
        return length*breadth*height;
    }
    void setLength( double len){
        length = len;
    }
    void setBreadth(double bre){
        breadth = bre;
    }
    void setHeight( double hei){
        height = hei;
    }
    // overload + operator to add two Box objects
    Box operator+(const Box& b){
        Box box;
        box.length = this->length + b.length;
        box.breadth = this->breadth + b.breadth;
        box.height = this->height + b.height;
        return box;
    }
    private:
    double length;
    double breadth;
    double height;
};

int main(){
    Box Box1;
    Box Box2;
    Box Box3;
    double volume = 0.0;
    Box1.setLength(6.0);
    Box1.setBreadth(7.0);
    Box1.setHeight(5.0);
    Box2.setLength(12.0);
    Box2.setBreadth(13.0);
    Box2.setHeight(10.0);
    volume = Box1.getVolume();
    cout << "Volume of Box1:" << volume << endl;
    volume = Box2.getVolume();
    cout << "Volume of Box2:" << volume << endl;
    Box3 = Box1 + Box2;
    volume = Box3.getVolume();
    cout << "Volume of Box3:" << volume << endl;
    return 0;
}
